A light-emitting diode(LED) is a semicondctor device that emits visible light when light when an electric current passes through it. Samsung is manufacturing several kinds of LEDs, specially focusing on high bright LED by using materials of AIGalnP and InGaN.
The output from an LED canrange from red(630~700nm)to blue-violrt(400nm), including blue, green and white. Some LEDs emit infrared(IR) energy(830nm~)such a device is known as an infrared -emitting diode (IRED) Benefits of LEDs and IREDs, compared with incandescent and fiuorescent illuminating devices,include low power requirement,High efficiency,Long life, etc.
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